function getScroll(){
document.documentElement.scrollTop || window.pageYOffset || document.body.scrollTop
}
function getStyle(ele,styleName){
if(ele.currentStyle){
return ele.currentStyle[styleName];
}else{
return window.getComputedStyle(ele,null)[styleName];
}
ele.style.styleName
原文:https://www.cnblogs.com/shiazhen/p/11877306.html